Run tests twice, once with, and once without coverage

We're doing this because certain tests have memory leaks only when code coverage is collected.

Author: WyriHaximus

.travis.yml

@@ -18,7 +18,8 @@ install:
   - composer install
 
 script:
-  - ./vendor/bin/phpunit -v --coverage-text --coverage-clover=./build/logs/clover.xml
+  - ./vendor/bin/phpunit -v
+  - XDEBUG_CODE_COVERAGE_IS_COLLECTED=yes ./vendor/bin/phpunit -v --coverage-text --coverage-clover=./build/logs/clover.xml
 
 after_script:
   - if [ -f ./build/logs/clover.xml ]; then travis_retry composer require php-coveralls/php-coveralls --no-interaction --update-with-dependencies; fi

tests/DeferredTest.php

@@ -23,6 +23,10 @@ public function getPromiseTestAdapter(callable $canceller = null)
     /** @test */
     public function shouldRejectWithoutCreatingGarbageCyclesIfCancellerRejectsWithException()
     {
+        if (getenv('XDEBUG_CODE_COVERAGE_IS_COLLECTED')) {
+            $this->markTestSkipped('This test has memory leaks when code coverage is collected');
+        }
+
         gc_collect_cycles();
         $deferred = new Deferred(function ($resolve, $reject) {
             $reject(new \Exception('foo'));
@@ -36,6 +40,10 @@ public function shouldRejectWithoutCreatingGarbageCyclesIfCancellerRejectsWithEx
     /** @test */
     public function shouldRejectWithoutCreatingGarbageCyclesIfParentCancellerRejectsWithException()
     {
+        if (getenv('XDEBUG_CODE_COVERAGE_IS_COLLECTED')) {
+            $this->markTestSkipped('This test has memory leaks when code coverage is collected');
+        }
+
         gc_collect_cycles();
         $deferred = new Deferred(function ($resolve, $reject) {
             $reject(new \Exception('foo'));
@@ -49,6 +57,10 @@ public function shouldRejectWithoutCreatingGarbageCyclesIfParentCancellerRejects
     /** @test */
     public function shouldRejectWithoutCreatingGarbageCyclesIfCancellerHoldsReferenceAndExplicitlyRejectWithException()
     {
+        if (getenv('XDEBUG_CODE_COVERAGE_IS_COLLECTED')) {
+            $this->markTestSkipped('This test has memory leaks when code coverage is collected');
+        }
+
         gc_collect_cycles();
         $deferred = new Deferred(function () use (&$deferred) { });
         $deferred->reject(new \Exception('foo'));